The least you can do is take it in and have it euthanized humanely. Allowing an animal to suffer and die because you think helping it is inconvenient is cruel and disgusting.
Pets cost money. The fact that this animal would die in the wild is irrelevant because this animal is NOT in the wild, it's in your home. Because of you. Take responsibility and do what is best for this snake, which, at this point, is probably putting it out of its misery.
